My boyfriend had a betta for about 7 months and he passed away this morning now I was wondering what happened. Over about 2 months his fins became tattered and he started to lose color. Over the last week he got extremely bloated like he was about to explode. He got fasted for 3 days and no change. He just hung out at the top of the tank floating normally not on side or anything. We also think he was older when we got him. He was much larger than the rest there and bigger than any of mine which are at about a year old. He was a vt
Tank is fully cycle
Temp 80 degrees
Water conditioner used
Fed omega one flakes he refused to eat pellets
Housed alone in a 5 gallon tank
Also how to pre pair for a new fish?
If he had internal parasites would they die off?
Should we clean entire tank?